* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-weight: normal;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}

body {
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

:root {
}

/* 去掉li 的小圆点 */
li {
  list-style: none;
}

img {
  /* border 0 照顾低版本浏览器 如果 图片外面包含了链接会有边框的问题 */
  border: 0;
  /* 取消图片底侧有空白缝隙的问题 */
  vertical-align: middle;
}

a {
  color: #fff;
  text-decoration: none;
}

input:focus {
  outline: none;
}
input:-internal-autofill-selected {
  background-color: #272727 !important;
}

/* 设置滚动条的样式 */
::-webkit-scrollbar {
  width: 4px;
  height: 2px;
}
/* 滚动槽 */
::-webkit-scrollbar-track {
  display: none;
  border-radius: 10px;
}
::-webkit-scrollbar-button {
  display: none;
}
/* 滚动条滑块 */
::-webkit-scrollbar-thumb {
  background: #272727;
}
::-webkit-scrollbar-thumb:window-inactive {
  /* background:rgba(255,0,0,0.4); */
}

.text_sm {
  font-size: 12px;
}

.text_s {
  font-size: 16px;
}

.text_m {
  font-size: 18px;
}

.text_l {
  font-size: 20px;
}

.text_xl {
  font-size: 22px;
}

.text_gray {
  color: #888888;
}

/* Nloading 加载动画*/
.Nloading {
  position: fixed;
  z-index: 9999;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* background-color: rgba(0, 0, 0, 0); */
  color: #fff;
  font-size: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: .3s ease;
  transform-origin:opacity transform;
}
.Nloading.remove{
  opacity: 0;
  transform: scale(2);
}
.Nloading > span {
  position: absolute;
  background-color: var(--bg);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  font-weight: bold;
  padding: 0 15px;
}
.Nloading > .N {
  animation: rotateN_r 3s ease infinite;
}
.Nloading > .W {
  animation: rotateN 3s ease infinite;
}
@keyframes rotateN {
  0% {
    transform: rotate3d(0, 1, 0, 180deg);
  }
  50% {
    transform: rotate3d(0, 1, 0, 0deg);
  }
  100% {
    transform: rotate3d(0, 1, 0, 180deg);
  }
}
@keyframes rotateN_r {
  0% {
    transform: rotate3d(0, 1, 0, 0deg);
  }
  50% {
    transform: rotate3d(0, 1, 0, 180deg);
  }
  100% {
    transform: rotate3d(0, 1, 0, 0deg);
  }
}

/* Nloading END */

/* lem_toast 弹窗样式*/
.lem_toast {
  position: fixed;
  z-index: 999;
  top: 40px;
  left: 50%;
  transform: translate3d(-50%, -50%, 0);
  background-color: #272727;
  color: #fff;
  padding: 6px 15px;
  font-size: 14px;
  border-radius: 5px;
  opacity: 0;
  letter-spacing: 1px;
  transition: 0.3s ease;
  transform-origin: opacity transform;
}
.lem_toast.active {
  opacity: 0.9;
  transform: translate3d(-50%, 0, 0);
}
/* lem_toast END */

.close_btn {
  position: relative;
  width: 30px;
  height: 30px;
  min-width: 30px;
  /* 颜色 */
  --color: #fff;
  cursor: pointer;
}
.close_btn::after {
  position: absolute;
  content: "";
  width: 100%;
  height: 2px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) rotate(-45deg);
  background-color: var(--color);
}
.close_btn::before {
  position: absolute;
  content: "";
  width: 100%;
  height: 2px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) rotate(45deg);
  background-color: var(--color);
}

/* header */
.header {
  position: sticky;
  z-index: 8;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  white-space: nowrap;
  background-color: #fff;
  transition: background-color 0.3s ease;
  box-shadow: 0 0 10px rgba(195, 195, 195, 0.15);
}

.header_r,
.header_l {
  display: flex;
  align-items: center;
}

.header_r {
  padding-right: 70px;
}

.header_r_m {
  display: none;
  align-items: center;
  padding: 0 20px;
}

.header_r_m_bar {
  position: relative;
  z-index: 2;
  width: 25px;
  height: 25px;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
}

.header_r_m_bar.active > p:nth-child(1){
  transform: translate3d(0,8px,0) rotate(45deg);
}
.header_r_m_bar.active > p:nth-child(2){
  opacity: 0;
}
.header_r_m_bar.active > p:nth-child(3){
  transform: translate3d(0,-8px,0) rotate(-45deg);
}

.header_r_m_bar > p {
  width: 100%;
  height: 2px;
  border-radius: 10px;
  background-color: #515151;
  transition: .3s ease;
  transform-origin: transform opacity;
  will-change: transform,opacity;
}

.header_r_m_bar > p:nth-child(2) {
  width: 80%;
}

.header_nav_m_mask {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: 0.2s ease;
  transform-origin: opacity;
}

.header_nav_m_mask.active {
  pointer-events: unset;
  opacity: 1;
}
.header_nav_m_mask.active > .header_nav_m {
  transform: translate3d(0, 0, 0);
}
.header_nav_m_mask.active > .header_nav_m > ul > li {
  animation: show_nav_li var(--i) ease;
}
@keyframes show_nav_li {
  0% {
    transform: translateX(50%);
  }
  100% {
    transform: translateX(0%);
  }
}

.header_nav_m {
  position: absolute;
  top: 0;
  right: 0;
  width: 80%;
  height: 100%;
  background-color: #fff;
  padding-top: 50px;
  transform: translate3d(50%, 0, 0);
  transition: transform 0.2s ease;
}

.header_nav_m > ul > li > a {
  display: inline-block;
  color: #000;
  font-size: 25px;
  padding: 15px 30px;
  width: 100%;
  letter-spacing: 2px;
}

.header_nav_m > ul > li {
  position: relative;
}

.header_nav_m > ul > li.active::after {
  content: "";
  position: absolute;
  width: 20%;
  height: 2px;
  background-color: #000;
  bottom: 5px;
  left: 30px;
}

.entry_m {
  width: 100%;
  position: absolute;
  bottom: 0;
  padding: 15px 30px;
  background-color: #479ee2;
  text-align: center;
  color: #fff;
  font-size: 24px;
}

.header_l > a {
  display: flex;
  align-items: center;
  color: #000;
}

.header_logo > img {
  width: 80px;
  height: 80px;
}

.header_logo_text {
  padding: 0 20px;
}

.header_nav > ul {
  display: flex;
}

.header_nav > ul > li {
  position: relative;
}

.header_nav > ul > li::after {
  position: absolute;
  content: "";
  width: 20%;
  height: 2px;
  background-color: #000;
  left: 50%;
  bottom: 15px;
  transform: translateX(-50%);
  opacity: 0;
  transition: 0.3s ease;
}

.header_nav > ul > li:hover::after {
  opacity: 1;
}

.header_nav > ul > li.active::after {
  opacity: 1;
}

.header.white_header {
  background-color: transparent;
  box-shadow: unset;
}
.header.white_header > .header_l h1,
.header.white_header > .header_l p,
.header.white_header > .header_r a {
  color: #fff;
}
.header.white_header > .header_r li::after {
  background-color: #fff;
}
.header_nav > ul > li > a {
  display: block;
  padding: 25px 20px;
  color: #000;
}

.header_enter {
  margin-left: 40px;
}

.header_enter > p {
  cursor: pointer;
  color: #fff;
  background-color: #000;
  padding: 10px 15px;
}

/* container */
.w_1024 {
  max-width: 1024px;
  margin: 0 auto;
}

.w_1440 {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 30px;
}

/* footer */
.footer {
  width: 100%;
  background-color: #000000;
  color: #fff;
}

.footer_p_one {
  width: 100%;
  background-color: #1a1c1e;
  padding: 50px 0;
  text-align: center;
}

.footer_p_one_title {
  padding-bottom: 40px;
}

.footer_nav {
  display: flex;
  justify-content: center;
  background-color: #1a1c1e;
  border-top: #525354 solid 1px;
  border-bottom: #525354 solid 1px;
}

.footer_nav > ul {
  display: flex;
}

.footer_nav > ul > li {
  padding: 20px 15px;
}

.footer_nav > ul > li > a {
  font-weight: 300;
}

.footer_p_three {
  display: flex;
  justify-content: space-between;
  padding: 70px 40px 50px 40px;
  word-break: keep-all;
}
.footer_p_three>a{
  transition: color .3s ease;
}
.footer_p_three>a:hover{
  color: #479ee2;
}

/* mobile */
@media screen and (max-width: 767px) {
  .w_1440{
    padding: 0;
  }
  .text_sm {
    font-size: 10px;
  }

  .text_s {
    font-size: 14px;
  }

  .text_m {
    font-size: 16px;
  }

  .text_l {
    font-size: 18px;
  }

  .text_xl {
    font-size: 20px;
  }

  .header_r {
    display: none;
  }

  .header_logo > img {
    width: 60px;
    height: 60px;
  }

  .header_r_m {
    display: flex;
  }

  /* footer */
  .footer_p_three {
    flex-direction: column;
    font-size: 12px;
    opacity: 0.6;
    padding: 24px 30px;
  }

  .footer_p_one_title {
    padding-bottom: 20px;
    font-size: 16px;
  }

  .footer_nav > ul > li {
    padding: 30px 10px;
  }

  .footer_nav > ul > li > a {
    font-size: 12px;
  }
}


/**
分页
 */

#resource_page {
  color: #fff;
  margin-top: 50px;
  user-select: none;
}
#resource_page ul {
  display: flex;
  justify-content: center;
}

#resource_page .page_btn {
  padding: 10px 15px;
  background: #1D1E22;
  border-radius: 5px;
  margin: 0 4px;
  color: #fff;
  cursor: pointer;
}

#resource_page .page_btn.active {
  background: none;
  color: #000;
}